What is Argument from repetition (argumentum ad nauseam or argumentum ad infinitum)?

The argument from repetition (argumentum ad nauseam or argumentum ad infinitum) is a logical fallacy that occurs when someone repeatedly asserts a point, irrespective of contradiction or lack of supporting evidence, in the belief that the repetition will make the argument more persuasive or true.

This fallacy is based on the idea that a statement becomes true, or at least more believable, the more it is repeated.

Everyday Example: A company claims that its juice cleanse is a "miracle detoxifier." Despite a lack of scientific evidence supporting detox claims, the company's advertisements repeat the assertion incessantly across various media platforms.

The repetition is used as a strategy to embed the idea in the consciousness of the public, hoping that consumers will accept the claim as true simply because it has been stated so frequently and confidently, not because any substantive evidence has been provided.